From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: moasenwood--- via Users list for the GNU Emacs text editor Newsgroups: gmane.emacs.help Subject: (was: Re: Replacement for string-as-unibyte-function) Date: Mon, 01 Feb 2021 17:05:35 +0100 Message-ID: <878s87g4ds.fsf_-_@zoho.eu> References: <20210131150133.0fd3b42f@gauss> <20210131215555.547fb92e@gauss> Reply-To: Emanuel Berg Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="4544"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) To: help-gnu-emacs@gnu.org Cancel-Lock: sha1:gjW84JxKnaLID/rr/w9/gywOvV4= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Mon Feb 01 17:07:52 2021 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1l6bk0-00013t-8P for geh-help-gnu-emacs@m.gmane-mx.org; Mon, 01 Feb 2021 17:07:52 +0100 Original-Received: from localhost ([::1]:34956 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1l6bjz-0005FB-4g for geh-help-gnu-emacs@m.gmane-mx.org; Mon, 01 Feb 2021 11:07:51 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:45924) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1l6bhx-0003Om-GH for help-gnu-emacs@gnu.org; Mon, 01 Feb 2021 11:05:45 -0500 Original-Received: from ciao.gmane.io ([116.202.254.214]:50262) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1l6bhv-0006iv-Ib for help-gnu-emacs@gnu.org; Mon, 01 Feb 2021 11:05:45 -0500 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1l6bht-0008qk-SH for help-gnu-emacs@gnu.org; Mon, 01 Feb 2021 17:05:41 +0100 X-Injected-Via-Gmane: http://gmane.org/ Mail-Followup-To: help-gnu-emacs@gnu.org Mail-Copies-To: never Received-SPF: pass client-ip=116.202.254.214; envelope-from=geh-help-gnu-emacs@m.gmane-mx.org; helo=ciao.gmane.io X-Spam_score_int: -15 X-Spam_score: -1.6 X-Spam_bar: - X-Spam_report: (-1.6 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.25, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.io gmane.emacs.help:127530 Archived-At: Stefan Monnier wrote: > Emacs receives the data from the process as a sequence of > *bytes* (after all, that's the only thing available in POSIX > communication). So in order to pass a sequence of *chars* > (aka "a multibyte string") to the process filter, Emacs's > internal C code has to do the equivalent of > > (*de*code-coding-string "thedatareceived" ') > > where is the coding system that > `make-network-process` decided to use for that process. Interesting, are we here talking computer communication in the protocol sense, which is basically the format of the message (the syntax of the packet, usually it has field with different metadata, then payload (the actual message), and BTW the metadata can refer to both the payload (e.g., its length) but also to the communication itself), furthermore the protocol stipulates the way messages should be sent between hosts (e.g., in what order), and last but not least, when syntax and procedure is covered, what it all means - the semantics. This is illustrated with Alice and Bob in the Anglo-American world and Abelard and Héloïse in the Franco-phone world, with arrows going back and forth between them. (Apparently they existed, and exchanged letters in the 12th century [1].) (I use to joke about "Care of Héloïse" when I clean and organize all my zillion tools and toolboxes. Get it? Instead of "Care of Kit" :) [2]) This is what I remember from school anyway. Or is it more like Unix IPC? In that case, what I remember ... err, we all use IPC every day. What I _don't_ have a snappy answer for, not from school and not from everyday life, is ? What is a coding system? [1] https://en.wikipedia.org/wiki/H%C3%A9lo%C3%AFse [2] https://dataswamp.org/~incal/tree-house/care-of-heloise.jpg [photo] -- underground experts united http://user.it.uu.se/~embe8573 https://dataswamp.org/~incal